Candelabrum socket



ay 8 @34 c. M. PETERsl-:N

CANDELABRUM SOCKET Filed Oct. 25, 1932 Patented May 8, 1934 UNITEDSTATES CANDELABRUM SOCKET Carl M. Petersen, Trenton, N. J., assigner toCircie F Mfg. Co., Trenton, N. J., a corporation of New JerseyApplication October 25, 1932, Serial No. 639,510

Claims.

This invention relates to candelabrum sockets and more particularly toan improvement in sockets of the so-called adjustable type.

Heretofore it has been the general practice to use a threaded fasteningor screw for locking together the arms of the extensible bracketelements. This practice has required the parts to rst be set to thedesired height and then the use of a screw driver or other tool tosecure the parts in their adjusted position. Not only is this practicetedious because of the several operations involved but frequently afterthe Workman sets the parts in their adjusted relation under the presentpractice they will slip or slide While he is manipulating the screwlocking means.

Accordingly, a primary object of the invention is to obviate thedisadvantages incident to the practice above outlined and to provide anovel means for locking the adjustable or extensible parts quickly inadjusted relation. That is to say, according to the present invention,after the brackets which support the socket have been attached to thexture, they can be adjusted with one hand to the desired height and withthe thumb or iinger of the same hand which does the adjusting, they maybe quickly and securely locked in adjusted position.

A further object of the invention is to provide simple, practical andreliable means for locking the bracket parts together which will notonly quickly and securely hold them in adjusted position, but if itlater becomes necessary to readjust the parts, such readjustments can bereadily effected by the same simple linger manipulation which wasutilized to effect locking.

A further object of the invention is to provide a candelabrum socketstructure which does not require the use of any tools to eifect itsmounting or adjustment.

With the above and other objects in view which will more readily appearas the nature of the invention is better understood, the inventionconsists in the novel features of construction, combination andarrangement of parts as will be hereinafter more fully described,illustrated in the accompanying drawing and dened in the appendedclaims.

A preferred and practical embodiment of the invention is shown in theaccompanying drawing, in which:

Figure 1 is a front elevation of the improved construction.

Figure 2 is a side elevation.

Figure 3 is a horizontal section taken on the line 3-3 of Figure 1.

(Cl. 24S-52.4)

Figure 4 is a View similar to Figure 3 illustrating the position of thelocking means in unlocked position.

Figure 5 is a detail perspective view of the locking lever.

Similar reference characters designate correspending parts throughoutthe several figures of the drawing. l

As previously indicated the present invention provides a novel iingermanipulated lock for securing the parts of the supporting brackettogether. To that end the locking lever A is provided, the same being somounted and arranged that when it is in a substantially horizontalposition, for example, the bracket parts may be freely I0 adjusted, butwhen the lever is turned to a position above or below horizontal,thereby to lie in close proximity to the adjustable members, the latterare held securely locked.

In the drawing, the fixture engaging bracket B and the socket carryingbracket C are arranged in overlapping or telescopic relation, one ofsaid members being provided with a slot and the other with a guiding pinoperating in the slot. In the example shown the socket carrying member Cis provided With the slot 1 and the fixture engaging member B isprovided with the cross-member or guiding pin 2. The latter is providedat its outer ends With the head portions 3 3 Which provide abutments forthe side arms of the bracket B to prevent separation thereof underpressure of the locking lever A as Will presently appear.

'Ihe said locking lever A is provided at one end with a sleeve 4 or itsequivalent which ts over the pin 2 in such a Way that the lever may havea free swinging movement about the pin. The ends of the sleeve 4adjacent the arms of the socket carrying bracket C are provided with thecam projections 5-5, which in one position of the lever A are adapted toregister with the slots 1 1 in the arms of the members C, and in anotherposition are adapted to engage the inside faces of the arms of themembers C and force the arms into binding engagement With the arms ofthe member B, the said latter arms being held against outward expansionor separation by reason of the heads 3 on the ends of the pin 2.

When the lever A is in the full line position shown in Figures 1, 2 and3, it will be apparent that the cam elements 5 force the arms of thebrackets B and C into locking engagement. On the other hand, when thelever A is in the dot and dash line position A (Figure 2) it Will beunderstood that the cam elements 5 are in the position shown in Figure 4to permit the adjustment of the members B and C.

Since the cam projections 5-5 are disposed at diametrically oppositepoints on the ends of the sleeve 4, it will be apparent that the lever Amay be swung upwardly or downwardly, away from the horizontal, for thepurpose of electing the locking together of theV extensible parts.

From the foregoing, it will be apparent that the present inventionprovides a simple and practical form of cam locking means for readilyand quickly securing the extensible bracket parts of a candelabrumsocket together, without the use of tools and with a minimum of time andeffort, while at the same time making adjustment more accurate.

Without further description it is thought that the features andadvantages of the invention Will be readily apparent to those skilled inthe art, and it will of course be understood that changes in the form,proportion and minor details of construction may be resorted ito,without Ydeparting from the spirit of the invention and scope of *n theappended claims.

portion of the pin between the slotted arms of one of the brackets, saidshiftable lever having means releasably to lock said arms in adjustedposition.

2. In a candelabrum socket, adjustable members connected by a crossmember, and a lever actuated cam mounted on said cross member forlocking said members in selected adjusted position, said cam having itsaxis of rotation coincident with the axis of the cross member.

.3. In a candelabrum socket, adjustable members connected by a crossmember, and a lever mounted on said cross member and having camprojections adapted in different positions of the lever to force theadjustable members into locking engagement.

4. In a candelabrum socket, adjustable members, a cross pin forpreventing separation of the members, and a lever mounted on one of themembers and having cam projections for forcing the adjustable membersinto locking engage- :ment at any selected point within the range ofmaximum movement permitted by the cross pin.

5. In a candelabrum socket, adjustable memlbers, a cross pin forvpreventing separation of the members, .a lever having asleeve portionjournalled on the pin, and cam projections carried by each `end of thesleeve for forcing the adjustable members in Vlocking engagement indifferent positions of the lever.

CARL M. PETERSEN.

